<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
.a {
	background-color: #09C;
	height: 300px;
	width: 1000px;
}
.b {
	width: 1000px;
	background-color: #FFF;
	height: 500px;
}
.f {
	color: #F66;
	height: 500px;
	width: 700px;
	background-color: #F69;
}
.e {
	height: 200px;
	width: 1000px;
	background-color: #0F0;
}
.c {
	clear: left;
	float: left;
	width: 700px;
	background-color: #F90;
	height: 200px;
}
.d {
	background-color: #F00;
	clear: right;
	float: right;
	width: 300px;
	height: 500px;
}
</style>
</head>

<body>
<div class="a">
  <p>&nbsp;</p>
<p>&nbsp;</p>
  <p>&nbsp;</p>
</div>
<div class="b">
  <div class="c"></div>
  <div class="d"></div>
  <div class="f">此处显示  class "f" 的内容</div>
</div>
<div class="e"></div>
</body>
</html>
